Water boiler



A. J. HANLoN WATER Bo'ILER.

Filed oet. 17; 1932 Dec. 1l, 1934.

Patented Dec. 11, 1934 WATER BOILER Anthony Joseph Hanlon, New York, N. Y., as-

signor to The International Nickel Company, Inc., New York, N. Y., a corporation of Delaware Application October 17, 1932, Serial N0. 638,166

3 Claims. (Cl. 220-67) ring 8. Such a construction reinforces the head The present invention relates to water heaters of the tank and makes. it possible to subject the and more particularly to reinforced Water tanks of light gauge corrosion resistant material.

It is an object of the present invention to provide a water tank capable of withstanding higher pressures While at the same time utilizing lighi er gaugesof corrosion resistant metals than those in common use in the trade under prior practices.

, It isa further object of the invention to provide a water tank or heater of such a construc- Other objects and advantages of the invention Head, com will become apparent from the following descrip- Diameter Shell Vex side tion taken in conjunction with the .drawing in 30 which: 12. 045. 021.

Fig. 1 is an elevational view, partly in section .ggj .ggg for the purposes of clarity, of a water tank em- 18' :070. :037. 'bodying the principles of the present invention; 20' .080' .040'

snugly fit against the inner walls of shell 1. It

is preferred to have a snug t. Any suitable Dime@ Shef-n Headeon- 50 means may be employed for rigidly and fixedly Vex sld securing head 2 to the shell 1. In practice, it is preferred to weld head 2 to shell 1 by means of E: -ggf gli a welded joint 4, preferably extending about the 16' 109s' 125s' entire periphery. -lj 55 For the purpose of reinforcing head 2,V it is tion that relatively expensive corrosion resistant metals of light gauges can be utilized not only in the shell ofthe tank but also as heads for the top and the bottom of the tank.

It is a further object of the invention to provide a water tank which has a simple construction which is satisfactory to use and which can be manufactured easily, economically and practically.

It is also within the contemplation of the invention` to provide a method for manufacturing water-tanks or heaters of .the character herein set forth and described on an industrial and commercial scale in a practical manner with standard equipment and machinery.

and

Fig. 2 is an enlarged fragmentary sectional View of a corner of the tank shown in Fig. 1 to illustrate the head construction.

Referring more particularly to Fig. 1, the reference character l, designates the shell of a tank.

, For purposes of illustration, the tank is shown in the form of a cylinder. Of course, the tank may have any suitable shape as those skilled in the art will readily understand.

In the preferred construction, a head 2 is mounted at the top and the bottom of the cylindrical shell 1 as shown in the drawing. Ihe straight sides 3 of the inwardly concave head 2 preferred to provide a steel head 5 which-conforms to the shape of head 2. The end of shell 1 is spun overthe end 6 of steel head 5 in the form of a ange 7. I have found that ange '7 and steel head 5 can be locked in place by means of tank to higher pressures than could be used in conjunction with heads of light gauge corrosion resistant metal.

A tank or water heater embodying the principles of the present invention such as the water tank illustrated in the drawing has been-subjected to the tests set forth in the A. S. M. E. code. The results of the test showed that water tanks and heaters embodying the present invention were capable of withstanding higher pressures with lighter gauge metal than used in prior tanks. A test on several of the present vwater tanks of different sizes when made of Monel metal and steel reinforcing heads showed that these tanks could withstand a test pressure of 400 lbs. per sq. in. corresponding to a working pressure of 170 lbs. per sq. in. when conducted in accordance with the A. S. M. E. code. The results are givenin Table I as follows:

Table I Test pressure =400 lbs.lsq. in. Working pressure= 170 lbs./sq. in.

' *For pressure on convex side.

Table II Test pressure =30 lbs/sq. in. Working pressure= 127. 5 lbs/sq. in.

*For pressure on convex side.

It will be observed that by the use of the present invention a substantial saving 1n metal can be effected. The saving as expressed in percent- Table III Head-sav- Dameter ingin metal It will be noted that the present invention provides a water tank which has been found to be wholly practical and satisfactory with a consumption of relatively low amount of corrosion resistant metal which is -in sharp contrast to prior practice and proposals wherein the construction and method of fabricating was such as to require an extra heavy thickness of metal particularly for the top and bottom heads. When prior procedures and constructions are employed in conjunction with corrosion resistant metals, the price of the tank, water heater, boiler or the like becomes excessive and beyond the price range available to most members of the public.

It is to be further observed that the present invention provides a procedure which permits the use of very thin corrosion resistant metal for use in tanks, water heaters, boilers and the like and particularly for use in the top and bottom heads of such tanks, heaters and boilers.

It is also to be noted that the present invention provides a tank, heater, boiler and the like and process of making the same which makes it possible to utilize relatively expensive corrosion resistant metals such as Monel metal, stainless steel and the like.

What is claimed is:

1. An improved reinforced tankcomprising a shell made of a corrosion resistant metal, a head made of said corrosion resistant metal and xedly secured within said shell at each end thereof, said head having an inwardly concave shape, a reinforcing head fitting adjacent to said corrosion resistant metal head and being located outside of said shell, said reinforcing head being made of a strong metal, a flange connected to said shell and formed inwardly around the en'd of said reinforcing head to hold it in position and a locking ring fitting snugly within each end of said shell against said flange to lock the same in position.

2. An improved reinforced tank comprising a shell of corrosion resistant sheet metal, a head of said corrosion resistant sheet metal being positioned within said shell at the top and bottom thereof and being concave inwardly, each head being held iixedly in position by a weld, a reinforcing head made of a ferrous metal and fitting against said inwardly concave head, said reinforcing head being located on the outside of said shell and substantially conforming to the shape of said head of corrosion resistant metal, a flange constituting an extension of said shell formed about the end of said ferrous reinforcing head to hold the same in position, and a metal locking ring fitted within said reinforcing head and making a frictional joint with said flange to lock the same xedly in position.

3. An improved reinforced tank comprising a cylindrical shell, said shell being constituted of a copper-nickel alloy of a relatively light gauge, a head fitting within said shell and located at each end thereof, each head being inwardly concave, a seam weld extending about the periphery of said shell to unite each head to the shell and to make a water tight joint therewith, a ange for holding said steel head in position and constituting an extension of said shell, and a steel locking ring located within said reinforcing head and making a frictional joint with said flange to lock the same in position.

ANTHONY JOSEPH HANLON.

CII 

